Hybrid Hard Drives with NonVolatile Flash and Lon…….ppt

Hybrid Hard Drives with Non-Volatile Flash and Longhorn Jack Creasey Program ManagerHardware Innovation GroupMSHybrid@M Microsoft Corporation Session Outline Demo Introduction Hybrid Hard Disk Architecture Power Savings using NV Cache Demo Results (Power saving) Faster Boot and Resume Process Demo (Boot and Resume) System Design with the Hybrid Hard Disk Other Design Approaches Next Steps Session Goals Attendees should leave this session with the following: An understanding of the power savings that can be achieved using Hybrid Hard Disk technology An understanding of the boot and resume efficiencies that can be achieved using Hybrid Hard Disk with Windows codenamed “Longhorn” An understanding of the increase in MTBF expected from a Hybrid Hard Disk Knowledge of where to find resources to aid in system design using the Hybrid Hard Disk Storage Devices: Key Windows Strategies Demo Power Savings Why Change the Disk Drive? Consumes 10-15% of the power budget in mobile solutions Slow power up Spin up times can be 2-5 seconds Seek and rotational latency is a performance bottleneck Fragile, shock prone, low MTBF in mobile systems Most common failure point in mobile solutions Failure may result in user data loss What is a Hybrid Disk Drive? Why is a Hybrid Hard Disk Better? Reduce Power Consumption Read and Write disk data while drive is in a low power state with the spindle stopped Faster Boot and Resume Instant access to data in NV Cache Higher Reliability Better shock resistance Lower operating duty cycle Hybrid Disk Drive Benefits Technical Assumptions for Hybrid Disk Longhorn* with its advanced memory management is the optimal for caching read data (but not write data) The Hybrid Hard Disk NV Cache is the optimal location for write data NV Cache should be = 64MB and we recommend 128MB Longhorn* will be able to define data (LBAs) to be Pinned in the NV Cache for Boot and Resume benefits Flash Buffer Size for Power Reduction Field data from Windows XP-based PCs